diff --git a/docs/images/Makefile b/docs/images/Makefile
--- a/docs/images/Makefile
+++ b/docs/images/Makefile
@@ -6,6 +6,10 @@
 
 all: $(BUILD_TARGETS)
 
+sphinx/html: all
+
+sphinx/clean: clean
+
 
 # dia exporters